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1、本文格式为Word版，下载可任意编辑基于MATLAB的图像增强算法的研究 图像巩固算法研究与实现 摘 要:图像处理是近年来进展起来的新兴研究领域，受到越来越多学者的关注。本论文主要研究图像处理的一个重要分支图像巩固技术。由于图像在生成、传递、压缩、储存、变换等一系列过程中，会受到各种因素的影响，例如在不同的照明环境下操作，会引起图像亮度的变化；操作设备时，不成制止地会发生抖动，引起图像位移；抓获到的图像比较度低或是位置不适当等等。在实际应用中，这些都会造成图像质量的退化，影响图像的整体视觉效果。因此，为了解决这些问题，需要对图像举行巩固处理，对已获取的图像举行加工处理，有目的地对图像举行巩固，
2、譬如突出图像的局部细节特征或是巩固图像的整体效果，同时抑制图像中不必要的细节信息，把模糊的图像变成明显的图像，改善图像的质量，以便在后续的图像分析时，测验者或计算机视觉系统可以对图像举行更好地分析和理解。 本文对图像巩固技术的常用方法举行了介绍，其中主要介绍了空域图像巩固算法的原理及方法，包括灰度变换、直方图处理(直方图均衡化和直方图规定化)等和频域图像巩固算法的原理及方法，包括低通滤波、高通滤波、同态滤波，以及彩色图像巩固算法的原理及实现。在此根基上，提出了两种结合空域和频域特征的图像巩固算法，并在MATLAB开发平台实现了相关算法。测验结果说明，经这种综合的图像巩固算法处理后的图像，其主观
3、效果明显改善，图像巩固的效果也比采用一种算法的效果要好。 关键词:图像巩固；空域图像巩固；频域图像巩固；彩色图像巩固 Research and Implementation of Image Enhancement Algorithm Abstract:Image processing has developed quickly in recent years, it was a new kind of research field, more and more scholars have paid attention to it. This paper mainly studied an i
4、mportant branch of image processing-image enhancement technology. During the generation, transmission, compression, storage, transformation and other a series of process, image would be affected various factors, such as:variations in the operating environments illumination could cause lighting chang
5、es; when operating the equipment, shocking inevitably occurs, causing displacements; it was common to capture image with low contrast or inappropriate position, etc. In practical application, these factors could cause image quality degradation, and the overall visual effect of the image. Therefore,
6、in order to solve these problems, it was need to enhance the image,and improve the quality of the image. Image enhancement was an important part of image processing, and aimed at enhancing the image with the purpose, for example, it was not only enhance the contrast of entire image or the local deta
7、ils but also inhibit the unnecessary details of the image, make fuzzy image turn into clear image, improve the quality of image, so that in the subsequent image analyze, an operator or a machine vision system could be better to analyze and understand the image. This paper introduced the commonly met
8、hods of image enhancement, including the principle and method of the image enhancement algorithm in the spatial domain, such as gray level transformations, histogram processing (histogram equalization and histogram specification) and so on and the principle and method of the image enhancement algori
9、thm in the frequency domain, such as lowpass filter, highpass filter, and homomorphic filter，and the color image enhancement algorithm.Based on this, two image enhancement algorithms combining spatial and frequency domain features were proposed, and the correlation algorithm was implemented in the M
10、ATLAB platform.Experimental results showed that the subjective effect of the image enhancement algorithm was obviously improved after this synthetic image enhancement algorithm, and the effect of image enhancement was better than the one algorithm. Keywords:Image enhancement;Image enhancement in the
11、 spatial domain;Image enhancement in the frequency domain;The color image enhancement 西安石油大学本科毕业设计（论文） 目 录 1.1 课题的背景及意义 . 1 1.1.1 课题的背景 . 1 1.1.2 研究意义 . 2 1.2 国内外研究现状与分析 . 3 1.3 本文研究的主要内容 . 4 2 空域图像巩固算法的原理及实现 . 6 2.1 直方图修正 . 6 2.1.1 直方图均衡化 . 6 2.1.2 直方图规定化 . 7 2.2 锐化 . 8 2.2.1 梯度锐化法 . 8 2.2.2 拉普拉斯锐化 . 11 2.3 去噪 . 12 2.3.1 邻域平均法 . 12 2.3.2 中值滤波法 . 14 2.4 灰度变换 . 15 2.4.1 比例线性变换 . 15 2.4.2 分段线性变换 . 17 2.4.3 非线性灰度变换 . 18 3 频域图像巩固算法的原理及实现 . 20 3.1 低通滤波器 . 20 3.2 高通滤波器 . 20 3.3 同态滤波器 . 21 4 彩色图像巩固算法的原理及实现 . 23 4.1 假彩色巩固 . 23 4.2 伪彩色巩固 . 23 4.2.1 密度分割
